[nbud]

Hello,

I am trying to run a simulation for a relatively simple geometry:



The bottom surface is a spline surface, the rest are simple walls. The inlet, outlet and the inside fluid exist but aren't displayed in this picture.
In the boundary conditions I have left the 'interior-xxx' as generated by Fluent, and set inlet, outlet and walls as I want. The coarse vector field is:



The fluid is obviously slipping in the walls, which I don't want.
The interesting thing was when I investigated the Boundary Conditions part - I couldn't change any the settings for most walls, but for the ones I could -
some were hardly an edge or a very small surface, for example:



Any help would be much appreciated.

Thanks,
Nitsan.